Major Flood
12 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
10 ft
Minor Flood
9 ft
Action Stage
8 ft
What Floods at Each Level
15.5 ft
The bridge on 14th Ave NW is overtopped.
14 ft
The bridge on Sioux Conifer Road is overtopped.
12 ft
Sioux Conifer Road floods south of the gauge, and water reaches the bottom of the bridge at the gauge.
10 ft
Significant amounts of pasture land are flooded.
8 ft
Minor lowland flooding begins, mainly upstream of the gauge.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Apr 5, 1997 | 12.49 ft | 5,800 cfs |
| Apr 6, 2001 | 11.58 ft | 3,730 cfs |
| Apr 7, 1969 | 11.4 ft | 1,750 cfs |
About This Gauge
USGS Site
NWS LID
WBSS2
River
Big Sioux River
County
Codington, SD
Coordinates
44.9425°N, 97.1458°W
Get Flood Alerts for Big Sioux River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Big Sioux River at Watertown Sioux Conifer Road?
The Big Sioux River at Watertown Sioux Conifer Road gauge is maintained by USGS (site 06479500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Big Sioux River at Watertown Sioux Conifer Road?
The NWS-defined flood stage for Big Sioux River at Watertown Sioux Conifer Road is 9 feet. Action stage begins at 8 feet. Moderate flooding starts at 10 feet, and major flooding at 12 feet.
How do I get alerts when Big Sioux River rises?
Download StormCast free on Google Play, go to River Gauges, and add Big Sioux River at Watertown Sioux Conifer Road to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Big Sioux River at Watertown Sioux Conifer Road gauge located?
The gauge is located in Codington County, South Dakota at coordinates 44.9425°N, 97.1458°W. USGS site number: 06479500. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.
- Gauge reading may be affected by ice.